Snow-plow



No. 65,688. Patented Dec; I3, I898. C. DUFF.

SNOW PLOW.

(Application filed Apr. 21, 1898.)

(No Model.)

INVENTOH A TTOHNEYS.

UNITED STATES PATENT FFIC-E.

CYRILLE DUFF, OFMILLBURY, MASSACHUSETTS.

SNOW- PLOW.

SPECIFICATION forming part of Letters Patent No. 615,688, dated December13, 1898.

Application filed April 2 l 1 8 9 8.

To all whom zit may concern:

Be it known that I, CYRILLE DUFF, of Millbury, in the county ofWVorcester and State of Massachusetts, have invented a new and ImprovedSnow-Plow, of which the following is a full, clear, and exactdescription.

The object of my invention is to provide a snow-plow capable of use inconnection with any form of car and which will be simple, durable, andeconomic and practically selfcleaning.

The invention consists in the novel-construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicafecorresponding parts in all the figures.

Figure 1 is a plan view of the improved snow-plow. Fig. 2 is a sideelevation of the same. Fig. 3 is a front elevation of the plow. Fig. 4is a horizontal section through the plow, taken just above the screws;and Fig. 5 is a side elevation of the coupling between the screws of theplow. I

The bodyof the plow consists of two shovelblades Aand B, which areconnected together at an angle. The front faces of both blades areconcaved and preferably their rear faces are convexed. The blades are socurved transversely that the lower end of the point 10, where the bladescome together, extends beyond the upper portion of the point. The upperedges of the blades are so bent that the space between top and bottom atthe rear ends of the blades is much more contracted than the space at ornear the point, as shown at 12 in Fig. 2, and the upper edges of theblades from a point near their centers to their rear ends overhang thelower edges, as shown in Figs. 1 and 3. Each blade is provided with ahorizontal opening 13, extending from the outer end near the nose orpoint of the plow, the forward ends of the slots or openings beingcontracted, as shown at 14 in the drawings. The slots are more or lesstapering, their outer ends being much wider than their inner ends, andback of the main portion of each slot a segmental pocket 15 is securedto Serial No. 678,371. o model-) the back of each blade, the saidpockets be ing made to taper, their outer ends being their wider ends.

A screw 0 is held to turn in each pocket 15, which pockets serve asbearings for the screws, their forward open portions being of less widththan the diameter of the screws, whereby the screws are prevented fromleaving said pockets. These screws taper correspondingly to the pocket,being of less diameter at their forward than at their rear ends. The twoscrews are connected by a coupler D, (shown best in Fig. 5,) whichconsists of a cross-bar 16, provided with a fork 17 at each end. Eachfork 17 is pivotally attached to a block 18, and brackets 19 arepivotally connected with opposite sides of the blocks, the

pivots of the brackets being at right angles to the pivots of the forks17, and the said brackets are adapted for attachment to the forward endportions of the screws. Ordinarily a wheel 20 is secured upon thecrossbar 16, as shown in Fig. 4, which wheel by engagement with theground will serve to turn the two screws, which screws will likewise beturned in a measure by the snow crowded upon them. The screws carry thesnow backward, keeping the front faces of the blades properly cleanedand causing the bulk of the snow to be delivered at the rear ends of theblades. The rear inclination or contraction of the front faces of theblades serves to force the snow to the screws, and as the screws widenin direction of the rear they readily free themselves and quicklydischarge the snow.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A snow-plow consisting of blades con nected at anangle to each other, the front faces of the blades being concaved, thelower edges of the blades at the point of the nose extending beyond theupper edges while the upper edges of the said blades overhang the loweredges from a point near the center to their rear ends,rearwardly-extending tapering pockets formed in each blade, the outerends of the pockets being the wider ends, correspondingly-taperingscrews held to turn in the said pockets, and a connection between thetwo screws, whereby the screws move together, for the purpose specified.

2. A snow-plow consisting of blades connected at an angle to each other,the front faces of the blades being concaved, the lower edges of theblades at the point of the nose extending beyond the upper edges whilethe upper edges of the said blades overhang the lower edges from a pointnear their center to their rear ends, longitudinal slots formed in eachblade, the slots being of greater width at the rear end than at theforward end portion of the said blades, corresponding tapering segmentalpockets secured to the rear of

